【源码】inpaint_nans函数：对二维数组中的NaN元素插值（或外推）

使用非NaN数据对二维数组中的NaN元素进行插值。

Interpolate NaN elements in a 2-d array using non-NaN elements.

也可以进行外推，因为该函数不使用数据的三角测量。

Can also extrapolate, as it does not use a triangulation of the data.

Inpaint_nans提供了几种不同的插值方法，这些方法在精度、速度以及所需内存方面进行折中平衡。

Inpaint_nans offers several different approaches to the interpolation, which give tradeoffs in accuracy versus speed and memory required.

inpaint_nans中使用的所有方法都基于稀疏线性代数和PDE离散化。

All the methods currently found in inpaint_nans are based on sparse linear algebra and PDE discretizations.

从本质上讲，PDE是为了与所提供的信息保持一致而实现的解决方案。

In essence, a PDE is solved to be consistent with the information supplied.

源码下载地址：

http://page2.dfpan.com/fs/4ldc2je29231f209166/

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